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Rotary Microtome HM 355 S
ROTARY MICROTOME
HM 355 S
INSTRUCTION MANUAL
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
CERTIFICATION
MICROM International GmbH certifies that this instrument has been tested
and checked carefully. Its technical data was verified before shipment to be
in accordance with the published specifications.
The instrument complies with applicable international safety regulations.
WARRANTY
This MICROM product is warranted against defects in material and
workmanship for a period of 1 year. Parts which prove to be defective during
the warranty period will be repaired or replaced free of charge by MICROM
International GmbH. No other warranty is expressed or implied.
Unauthorized modification or repair by third party persons will void the
warranty.
The warranty will expire in case of improper or wrong use of the instrument
and in case the warning and precautionary messages are not observed.
MICROM International GmbH is not liable for any occurring damage.
Errors and ommissions excepted. Subject to amendment and improvement
without further notice.
This instruction manual will be supplied together with each instrument.
Further copies can be ordered at the nearest MICROM sales office by giving
the serial number of the instrument, the number of the instruction manual and
the date of issue.
This instruction manual is available in the following languages:
German:
English:
French:
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Cat. No.
387 672
387 673
387 674
Rotary Microtome HM 355 S
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
INTENDED USE
Dear Customer,
Before operating the instrument, please read these instructions carefully to
familiarize yourself with its proper operation and functions.
Only skilled or specially trained personnel must operate the microtome, i.e.
clamping the specimen, trimming, sectioning and taking off the sections from
the instrument. The listed and marked safety measures as well as the
regulations of your respective lab must be strictly observed.
MICROM-Ser. No.: .....................................................................
Please enter the serial number, which is placed on the type plate on the rear
side of the instrument. This way, questions and service can be handled
faster.
Instruction Manual No. 387673
Issued on Sept. 16, 2003
MICROM International GmbH
Robert-Bosch-Strasse 49
D-69190 Walldorf
Telefon: (06227) 836-0
Telefax: (06227) 836-111
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
Intended Use
Table of Contents
EC Certificate of Conformity
Safety precautions
Part 1
1-1
1-2
Part 2
2-1
2-2
2-3
2-4
Introduction
Description of the Rotary Microtome HM 355 S
Technical specifications HM 355 S
Operating instructions
Setting up the microtome
Initial turn-on
Cutting movement and retraction
Setting section thickness and trimming thickness
2-5
2-5-1
2-5-2
2-5-3
Specimen feed
Coarse feed and speed for coarse feed
Trimming and first cuts
Fine feed
2-6
2-6-1
2-6-2
2-6-3
2-6-4
2-6-5
2-6-6
2-6-7
Motorized cutting drive
Setting cutting window
Selection of operating modes
Setting cutting speed
Push-in handwheel handle
Start and stop of cutting drive
Handwheel brake
Emergency stop
2-7
2-7-1
2-7-2
2-7-3
Indication of cutting processes
Section counter
Sum of section thicknesses
Remaining travel to front end position
2-8
Turning off the function <retraction>
2-9
Selecting the indicated language
2-10
2-10-1
2-10-2
2-10-3
2-10-4
2-10-5
Specimen clamping
Universal cassette clamp
Standard specimen clamp
Insert for round specimens, V-insert and V-distance piece
Foil clamp
Segment arc and universal specimen holder
MICROM Internatio nal GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-11
2-11-1
2-11-2
2-11-3
2-11-4
Adapters for specimen clamping
Adapter, non-orienting
Adapter, orienting, specimen orientation
Changing and/or clamping specimen clamps
Readjusting specimen clamps
2-12
2-12-1
2-12-2
2-12-3
2-12-4
2-12-5
2-12-6
Knife carriers
Standard knife carrier N
Disposable blade carrier E
Knife carrier C
Knife carrier S
Readjusting the knife carriers N, E and C
Readjusting the knife carrier S
2-13
2-14
2-15
2-16
2-16-1
2-16-2
2-17
2-18
Section waste tray with integrated arm rest
Storage unit
Backlighting system
Specimen approach methods
Memory function
Automatic approach system
Large field magnifier
Standard equipment
2-19
2-19-1
2-19-2
2-19-3
2-19-4
2-19-5
Additional equipment (optional)
Knife carriers
Specimen clamps
Optical accessories
Microtome knives
Additional accessories
Part 3
Theory of operation
3-1
3-2
3-3
3-4
3-5
3-6
3-7
Part 4
Cutting movement and retraction
Specimen coarse feed and trimming function
Operating panel and foot pedal
Specimen clamping system and specimen orientation
Knife carriers
Microtome with freezing unit
Automatic approach system
Working with the microtome
4-1
Preparation and orientation
4-2
Coarse feed and trimming function
4-3
Sectioning instructions
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
4-3-1
4-3-2
Condition of the knife edge
Clean knife surfaces
MICROM Internatio nal GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
4-4
4-4-1
4-4-2
4-4-3
4-4-4
4-4-5
4-4-6
4-4-7
How to avoid malfunctions
Preparation of the specimen
Temperature of the specimen
Tightening the clamping screws
Selection of the knife
Adjustment of the knife
Cutting speed
Trimming
Part 5
Maintenance
Part 6
Cleaning and Care
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
EC Certificate of Conformity
Name and address of
the manufacturer:
MICROM International GmbH
Robert-Bosch-Straße 49
D-69190 Walldorf
Product designation:
Type reference:
Rotary Microtome
HM 355 S
The designated product complies with the laid down regulations:
73/23/EWG with amendments
89/336/EWG with amendments
The designated product complies with the EC regulations by strictly observing the following
norms:
"Guideline of the Council for the alignment of the legal instructions of the member
countries on electrical means of production for the use within certain voltage limits"
International Norm
European Norm
IEC 1010-1:1990-09
EN 61010-1:1993
+A1:1992-09 + A2:1995-06 +A2:1995
German Norm
VDE-classification
DIN EN 61010-1:1994-03
+A2:1996-05
VDE 0411 Teil1:1994-03
+A1:1996-05
"Guideline of the Council for the alignment of the legal instructions of the member
countries on electro magnetic compatibility"
European Norm
German Norm
VDE-classification
EN 61326:1997
EN 61326:1997/A1:1998
DIN EN 61326:1998-01
DIN EN 61326/A1:1999-05
VDE 0843 Teil 20:1998-01
VDE 0843 Teil 20/A1:1999-05
The VDE Prüf- und Zertifizierungsinstitut (EU reference no. 0366), Merianstr. 28, D-63069
Offenbach has checked and certified the product. The marks licences entitle MICROM
International GmbH to use the VDE labels opposite.
Marks licence no.: 95308 G
Marks licence no.: 95093 F
Hans Heid
Managing Director
MICROM Internatio nal GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Walldorf, 01 July 2002
Rotary Microtome HM 355 S
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
SAFETY PRECAUTIONS
CAUTION !
Please observe the following general precautions during operation of this instrument. Failure to
comply with these precautions violates safety standards and the intended use of the instrument.
MICROM International GmbH is not liable for misuse of the instruments and failure to comply
with basic safety requirements.
INSTRUMENT GROUNDING
To avoid injury from electrical current, the instrument must be connected to the safety ground. The instrument
is equipped with a three wire ground plug. The power outlet must be connected to the safety ground and must
meet the International Electrotechnical Commission (IEC) regulations.
CAUTION VOLTAGE
Never remove instrument covers during operation. Component replacement as well as adjustments must only
be made by trained service personnel. Unplug the unit before removing or opening the covers.
DANGER IN EXPLOSIVE ENVIRONMENT
The instrument must not be operated in the presence of flammable gases.
CARE IN USING MICROTOME KNIFE
To diminish the danger of being injured by the knife or blade, use the knife guard when
adjusting specimen and knife. If possible, the specimen should be clamped in before the
knife is inserted into the knife carrier. Before changing the knife carrier, always remove
blade or knife! Unused knives should always be kept in a knife case. Never try to catch a
dropping knife! Never check the sharpness of the cutting edge with your fingers. The
cutting edge is extremely sharp! Be careful when sectioning and/or removing sections.
EMERGENCY STOP
Cutting movement can be stopped immediately by pressing one of the two emergency stop devices.
The hand emergency stop button is placed on the right side below the handwheel. The foot emergency stop
device is integrated into the foot pedal.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
HAZARD OF RADIOACTIVE RADIATION
When working with radioactive specimens observe all applicable radiation safety procedures.
HAZARD OF INFECTION
Use the appropriate safety and disinfection measures when working with infectious specimens.
HAZARD OF MALFUNCTION
To avoid the hazard of malfunction of an instrument, it must only be operated in a controlled electromagnetic
environment. This means, that transmitters such as mobile phones must not be operated in their close vicinity.
HAZARD OF BIOLOGICAL DANGER
Specimens used during the intended operation of the instrument might potentially be infectious. For this
reason, it is recommended to observe the general laboratory regulations concerning protection against danger
of infection.
Information on decontamination media, their use, dilution and effective range of application can be read in the
Laboratory Biosafety Manual : 1984 of the World Health Organization.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
Fig. 1
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
PART 1
INTRODUCTION
1-1
DESCRIPTION OF THE ROTARY MICROTOME HM 355 S
The Rotary Microtome HM 355 S from MICROM International GmbH is a universal heavy duty microtome
for especially sophisticated paraffin, hard- and semi-thin sectioning techniques in biology, medicine and
industry.
The HM 355 S sets new ergonomical standards concerning operation and comfort. The instrument is
equipped with a section waste tray with integrated arm rest, which is built around the knife carrier for direct
collection of section waste.
This model can be equipped with all specimen clamps and knife carriers of the rotary microtome
HM 300 series. This also includes segment arc, universal specimen holder and glass knife carrier S for glass
and diamond knives. In addition, the stereomicroscope, the large field magnifier, the Histo Collimator and the
backlighting system can be adapted.
Further additional equipment for the HM 355 S are the storage unit with cooling insert for cassettes, brushes
and tweezers as well as the automatic approach system.
The HM 355 S will cut sections in a range from 0,5 up to 100 microns. For the protection of knife and
specimen, the instrument retracts the specimen at the end of the cut. If desired, the function <retraction> can
be turned off.
The electronically controlled motor drive with precision tachogenerator guarantees an extremely fast
adjustment to section force variations and constant cutting speed. It also ensures optimal section quality in
each field of application. This results in a constant cutting speed over the entire cutting stroke.
The motorized coarse feed system allows both the continuous and graduated specimen forward and
backward travel with three different speed settings. This way specimen and knife edge distance can be
adjusted quickly.
A trimming function with defined steps from 5 to 500 microns permits the fine adjustment up to the first cuts
and results in larger section thicknesses when trimming.
The operating panel is placed on the left side of the microtome. It can be removed and used separately, also
on the left side of the instrument. For this, the operating knobs can be removed and installed on the other side
of the operating panel. The touchpad keyboard is clearly arranged for easy and safe operation. The selected
section thickness, trimming thickness, section counter, sum of section thicknesses and remaining travel to the
front end position as well as the speed of the coarse feed and the speed of the cutting movement are
indicated on the display of the operating panel.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
The knife carriers are designed so the knives can be easily clamped in place and adjusted.
For the user's safety, the instrument is equipped with two emergency stop devices.
An electro-mechanical handwheel brake as well as a handwheel handle, which can be pushed in, are installed
for further safety.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
1 - 2
TECHNICAL SPECIFICATIONS HM 355 S
Microtome:
Section thickness range .............................................................. 0,5 - 100 µm
Resolution: ...................................................................... 0,5 µm for 0,5 - 5 µm
............................................................................................... 1 µm for 5 - 20 µm
............................................................................................. 2 µm for 20 - 30 µm
............................................................................................. 5 µm for 30 - 60 µm
......................................................................................... 10 µm for 60 - 100 µm
Trimming thickness range............................................................... 5 - 500 µm
Resolution:........................................................................... 5 µm for 5 - 10 µm
......................................................................................... 10 µm for 10 - 100 µm
....................................................................................... 20 µm for 100 - 200 µm
....................................................................................... 50 µm for 200 - 500 µm
Specimen retraction during
return travel of the specimen.................................................................. 60 µm
Horiz. feed range ............................................................................. max. 28 mm
Vertical specimen stroke ............................................................... max. 64 mm
Section counter:
Sum of section
thicknesses:
Remaining travel to front
end position:
Five-digit LC display with reset
Specimen size:
Specimen orientation:
Standard ........................................................................................... 55 x 50 mm
x - and y - axes: ............................................................................. universal 8°
z - axis: ............................................................................................... up to 360°
Cutting drive:
................................................................ motorized, electronically controlled
Modes of operation:
Cutting speed:
................................................. interval, single, multi and continuous stroke
........................................................................................................ 0 - 430 mm/s
Coarse feed:
Speed for coarse feed:
Storage
temperature range:
............................................................ motorized, graduated and continuous
.......................................................................................400, 800 and 1200 µm/s
Operating conditions:
.............................................. +5°C to +40°C (at a max. rel. humidity of 60%)
..............................................................................altitude up to 2000 m M.S.L.
.............................................................................................for indoor use only
Power requirements:
...................................................................220...230 V 0.8 A +/-10% 50...60 Hz
........................................................................... 240 V 0.8 A +/-10% 50...60 Hz
........................................................................... 100 V 1.6 A +/-10% 50...60 Hz
........................................................................... 115 V 1.6 A +/-10% 50...60 Hz
Pollution degree:
Overvoltage category:
.............................................................................................................................2
............................................................................................................................ II
Dimensions:
.................................................................. 410x520x280 mm (wide/deep/high)
Weight:
..................................................................................................................... 35 kg
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Five-digit LC display with reset
Five-digit LC display
.....................................................................................................-20°C to +50°C
Rotary Microtome HM 355 S
PART 2 OPERATING INSTRUCTIONS
2-1
SETTING UP THE
MICROTOME
Unpack the microtome and remove the wrapping.
On the lower side of the instrument towards the
front and rear longitudinal axis, there are recessed
grips to lift or carry the microtome. Do not
transport the instrument on the handle of the
handwheel!
Sectioning can be influenced by nearby instruments
which generate vibrations. For this reason, the
microtome should be placed on a stable and
vibration free table. To move the unit on the table,
lift the base slightly at the front end only and slide
it.
NOTE! Remove the section waste tray to move or
carry the instrument. The section waste tray can
be pulled out of its proper position.
2-2
INITIAL TURN-ON
CAUTION! Before turning on the instrument for
the first time, please check if the power
requirements indicated on the type plate correspond
to the power supply voltage being used.
The operating panel (fig. 4.1), which is separately
packed, can be attached to the instrument or used
freestanding. Firstly, connect the operating panel
with the instrument. A 37-lead control cable (fig.
2.1) is fixed on the back of the instrument. Connect
this cable with the connector at the back of the
operating panel.
Should the operating panel be attached to the
instrument, push the 37-lead connector through the
corresponding hole (fig. 2.2) on the back of the
microtome. Turn the connector 90° and push it
through the hole on the front of the instrument.
Plug the connector into the operating panel. Fasten
the cable on the panel with the two screws. To
clear away the cable, insert it into the
corresponding holders (fig. 2.3) on the back of the
microtome.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
As above-mentioned, the operating panel can be
used freestanding. It can be placed on the left as
well as on the right side of the microtome. For this,
the operating knobs (fig. 4.3 and 4.4) can easily be
removed and placed on the other side of the
operating panel.
Fig. 2
Connect the 5-lead plug of the foot pedal cable into
the outlet (fig. 2.6) and tighten the swivel nut.
NOTE! If the foot pedal is not connected, there is
the operating mode emergency stop (see part 2-67). This way, the handwheel brake is activated and
the cutting drive motor cannot be started. Always
connect the foot pedal!
Connect the power cord to the power socket (fig.
2.4) on the back of the instrument. Turn on the
power switch (fig. 2.5).
Then, the specimen holder moves to the rear end
position. This movement is always carried out
when the instrument is turned on. This way, the
instrument is calibrated.
The insert for the two fuses is placed beside the
power switch. The fuse for the motor supply is
placed on the left side of the mains plug unit.
(See part 5, exchange of fuses).
The terms shown on the display are available in
English, German and French. If desired, the user
can change the language. (see part 2-9, selecting
the indicated language).
Rotary Microtome HM 355 S
2-3
CUTTING MOVEMENT AND
RETRACTION
To start the cutting movement of the microtome,
turn the handwheel (or use the motorized cutting
drive). As the specimen moves down, sectioning is
carried out (cutting movement, fig. 3.2). Continue
turning the handwheel to bring the specimen back
up. To protect the knife and specimen during return
travel, the specimen is retracted (R). The yellow
LED RETRACT (fig. 5.1) lights up. If desired, the
function <retraction> can be turned off (see part 28, turning off the function <retraction>). The
instrument is able to adjust the cutting range to the
size of the specimen. This is called the cutting
window (F).
X=selected section thickness
1=specimen
2=cutting movement
3=knife
4=return travel
R=retraction
Fig. 3
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
5
3
4
2
1
Fig. 4
2-4
SETTING SECTION THICKNESS
AND TRIMMING THICKNESS
The required section and trimming thicknesses are
set by means of the control knob (fig. 4.3), which is
situated on the side part of the operating panel (fig.
4.1).
To choose between section thickness and trimming
thickness, press the operating knob (fig. 4.3). A
marking (fig. 5.5) in the first line of the display
shows which cutting thickness is selected.
Switching over from trim sectioning to fine
sectioning via the operating knob (fig. 4.3) can also
serve to reduce the motorized cutting speed (see
part 2-6-3).
If the trimming thickness is chosen, the LED in
button (fig. 5.14) lights up in addition to the marking
on the display.
After turning on the instrument, section thickness
setting is automatically chosen and shown
accordingly.
When turning the operating knob, slight resistances
can be felt. The selected values are shown in the
second line on the display (fig. 5.7) of the operating
panel.
"FEED" = selected section thickness
"TRIM" = selected trimming thickness
The graduation of the section thicknesses is divided
into 5 ranges:
range
up to 5µm
from 5µm to 20µm
from 20µm to 30µm
from 30µm to 60µm
from 60µm to 100 µm
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
graduation
0,5µm
1µm
2µm
5µm
10µm
Rotary Microtome HM 355 S
The graduation of the trimming thicknesses is
divided into 4 ranges:
range
up to 10µm
from 10µm to 100µm
from 100µm to 200µm
from 200µm to 500µm
2-5
graduation
5µm
10µm
20µm
50µm
SPECIMEN FEED
2-5-1 COARSE FEED AND SPEED
FOR COARSE FEED
For the fast forward and backward travel between
specimen and knife edge, the microtome has a
motorized coarse feed system. The specimen
holder is moved forwards as long as the button
<coarse feed forwards> (fig. 5.16) is pressed. To
move the specimen holder backwards, press the
button <coarse feed backwards> (fig. 5.15).
The instrument carries out movements of various
lengths according to how long the button (fig. 5.15)
is pressed. Press the button (fig. 5.15) only very
briefly and the specimen holder moves backwards
by a fixed value of 2 µm. If the button (fig. 5.15) is
pressed a little bit longer (not longer than 2
seconds), the specimen holder moves backwards
as long as the button (fig. 5.15) is being pressed. If
the button (fig. 5.15) is pressed for more than 2
sec., the specimen holder moves automatically to
the back end position and the motorized coarse
feed shuts off. This function can be stopped at any
time. For this, shortly press the button (fig. 5.15)
again.
When the back end position is reached, the red
LED in button (fig. 5.15) lights up.
When the front end position of the specimen
movement is reached, the red LED in button (fig.
5.16) lights up.
MICROM Internatio nal GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Three different speeds for the coarse feed are
available: 400, 800 and 1200 µm/s. The three
different speed settings are shown on the display
(fig. 5.7) on the right side in the third line as
follows:
*
**
***
= 400 µm/s
= 800 µm/s
= 1200 µm/s
To select or change the speed, press button <speed
coarse feed> (fig. 5.13) until the required speed is
shown in the third line on the right side of the
display (fig. 5.7).
CAUTION! With the function <coarse feed
forwards> specimen and knife edge are adjusted
very quickly. To avoid damage to specimen and
knife, carefully observe this adjustment process.
Take note that the specimen and knife edge do not
come in contact with each other. Carefully observe
the narrowing gap between specimen and knife
edge to stop the function <coarse feed forwards>
in time before the specimen touches the knife edge.
Rotary Microtome HM 355 S
1
3
RETRACT
STOP
2
4
MICROM
7
FEED = 3
CONT.
V = 25
COUNTER = 12
5
6
TRIM = 20
***
R
8
10
A
9
11
12
START
STOP
14
MODE
1,2,3
13
15
16
Fig. 5
2-5-2 TRIMMING AND FIRST CUTS
After the specimen and knife are adjusted, further
gradual feed for trimming can be carried out using
the function <trimming>. For different sectioning
series, deeper layers of the specimen can be
reached with the function <trimming>.
Button (fig. 5.14) is used for trimming, available as
pulse or permanent function.
The <pulse function> is used when there is still
some distance between specimen and knife edge.
Press the button (fig. 5.14). Whenever the button
(fig. 5.14) is pressed, the specimen holder moves
forwards by the trimming value which was
preselected on the control knob (fig. 4.3).
To select the <permanent function> press the
control knob (fig. 4.3) to choose the trimming
thickness setting. Then the red LED in button (fig.
5.14) lights up in addition. The feed is carried out at
each handwheel rotation in the upper reversal
point.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
The <permanent function> is used to get faster to
the desired sectioning level.
Rotary Microtome HM 355 S
2-5-3 FINE FEED
After having adjusted specimen and knife as well
as having trimmed the specimen, sectioning can be
started. Press the control knob (fig. 4.3) to select
the section thickness setting.
Turn the handwheel continuously in one direction to
feed the specimen at the selected section
thickness.
The same process is carried out when the motor
drive for the cutting movement is turned on.
The handwheel on the right side of the instrument
rotates.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-6
MOTORIZED CUTTING DRIVE
Sectioning can be carried out either manually by
turning the handwheel or by means of a motorized
cutting drive. The cutting movement can either be
released by pressing the button START/STOP (fig.
5.12) or by means of the foot pedal.
The controlled cutting speed can be set
continuously from 0 - 430 mm/s on the control knob
(fig. 4.4). The cutting speed refers to the cutting
window. For the upward return travel a
proportionally higher retraction speed is carried out.
To adjust the cutting window in relation to a
specimen, it can be set continuously within the
maximum values.
NOTE! The motorized cutting drive can only be
started, when the functions <handwheel brake>
(fig. 5.10) and <emergency stop> are not activated.
2-6-1 SETTING CUTTING WINDOW
Turn the handwheel so that the lower edge of the
specimen is positioned slightly above the knife
edge. Briefly press the button (fig. 5.8) to set the
upper limit of the cutting window.
Continue turning the handwheel clockwise to place
the upper edge of the specimen just below the knife
edge. Briefly press the button (fig. 5.8) to set the
lower limit of the cutting window. The green LED
in button (fig. 5.8) shows the length of the cutting
window during each further passing through of the
cutting window zone. A cutting window should only
be set while the specimen is moved downwards.
If, by mistake, a cutting window limit is set during
return travel of the specimen, the set limits are
applied to the cutting movement accordingly.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
2-6-2 SELECTION OF OPERATING
MODES
For the motorized cutting movement of the
microtome, the following operating modes are
available:
- interval stroke
- single stroke
- multi stroke
- continuous stroke
If the cutting drive is turned off, choose one of the
above-mentioned operating modes by pressing the
button MODE 1,2,3 (fig. 5.11) one, two or three
times. The selected operating mode (fig. 5.6) is
shown on the display (fig. 5.7) on the operating
panel. In the third line on the left side of the display,
the term INTER, SINGL, MUL xxx or CONT. is
shown.
To start the cutting movement, either use the foot
pedal (fig. 6) or press the button START/STOP
(fig. 5.12) on the operating panel. During the
motorized cutting movement, the green LED in
button (fig. 5.12) lights up.
INTERVAL STROKE
Press button (fig. 5.11) until the operating mode
interval stroke (fig. 5.6) is shown on the display
(fig. 5.7).
Now a gradual approach between specimen and
cutting edge is possible. The cutting drive only
moves as long as the button (fig. 5.12) or the foot
pedal is pressed.
Rotary Microtome HM 355 S
Fig. 6
SINGLE STROKE
Press button (fig. 5.11) until the operating mode
single stroke (fig. 5.6) is shown on the display (fig.
5.7).
Press the button (fig. 5.12) or the foot pedal once,
to release a single cutting cycle. The movement
stops in the upper reversal point.
MULTI STROKE
Press button (fig. 5.11) until the operating mode
multi stroke (fig. 5.6) is shown on the display (fig.
5.7).
Press the button (fig. 5.12) or the foot pedal once,
to release a multiple cutting cycle. The number of
the cutting strokes for one cutting cycle depends on
the respective pre-selection. For this, the mode
multi stroke must be selected as described above.
Then keep the RESET button (fig. 5.3) pressed and
then press simultaneously the mode button (fig.
5.11) until the desired cutting strokes (1 - 4) are
shown on the display.
The cutting movement stops in the upper reversal
point. The resolution is as follows:
1...10
10...20
20...30
30...50
1 µm-increments
2 µm-increments
5 µm-increments
10 µm-increments
CONTINUOUS STROKE
Press button (fig. 5.11) until the operating mode
continuous stroke (fig. 5.6) is shown on the display
(fig. 5.7).
To start a continuous cutting cycle, use the foot
pedal or press the button (fig. 5.12). To stop the
continuous stroke, press the foot pedal (fig. 6) or
the button (fig. 5.12) once more. However, if a
cutting cycle has been started, it will continue
through and stop in the next upper reversal point.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-6-3 SETTING CUTTING SPEED
The desired cutting speed is set continuously on the
control knob (fig. 4.4) and shown in the middle of
the third line on the display (fig. 5.7) with values
from 0 - 99. To save time, the return travel speed is
enhanced in relation to the cutting speed, especially
for slow cutting speeds.
In addition, the maximum range of the cutting
speed can be chosen smaller for fine sectioning
than for trim sectioning. Switching over from trim
sectioning to fine sectioning via knob (fig. 4.3)
results in a reduction of the motorized cutting speed
according to the corresponding preselection.
To preselect the speed reduction, press the buttons
(fig. 5.3 and 5.8). The symbols for the speed >>>>
are then shown in the third line on the display.
>>>>>>>>
>
= max. speed
= min. speed
To select the desired speed, press the scroll button
(fig. 5.2).
To store the selected speed, press button (fig. 5.3).
CAUTION! Switching over from fine to trim
sectioning results in the corresponding speed
increase.
2-6-4 PUSH-IN HANDWHEEL
HANDLE
For safer working with the motorized cutting drive,
the handwheel handle can be pushed in.
To lock the handwheel handle, first take the handle
on its outer bush and push it inside.
To unlock the handle, turn off the motorized cutting
drive and press the interior locking knob of the
handwheel handle. The manual cutting drive can be
used now.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
2-6-5 START AND STOP OF
CUTTING DRIVE
The cutting drive can be turned on and off by
means of the button (fig. 5.12) or the foot pedal.
For this, the functions <handwheel brake> and
<emergency stop> must not be activated. To stop
the cutting drive, the foot pedal can also be used.
The course function of the cutting drive results
from the selected cutting window, the selected
operating mode and the set cutting speed.
CAUTION! For your personal safety, push in the
handwheel handle before starting the motorized
cutting drive.
2-6-6 HANDWHEEL BRAKE
The microtome is equipped with a handwheel
brake. This way, unintended movements of the
specimen holder and knife carrier are avoided. This
reduces the danger of being injured while adjusting
specimen clamp and knife carrier.
CAUTION! When the instrument is turned off,
the handwheel brake cannot be activated.
First press button (fig. 5.12) to stop the motorized
cutting movement. Then activate the function
<handwheel brake> by means of the button (fig.
5.10). The red LED in the button (fig. 5.10) lights
up. Now, the motorized cutting drive cannot be
started by mistake! To release the handwheel
brake, press button (fig. 5.10) once more.
CAUTION! For your personal safety, the
<handwheel brake> should be turned on when
working on the specimen holder or knife carrier.
For this press button (fig. 5.10).
Rotary Microtome HM 355 S
2-6-7 EMERGENCY STOP
To quickly eliminate danger, the microtome has two
<emergency stop> devices.
CAUTION! In case danger arises from cutting
drive, push the <emergency stop>!
The hand emergency stop button is placed on the
right side of the microtome below the handwheel.
Press this red button to stop immediately the
motorized cutting drive. The red LED STOP (fig.
5.4) on the operating panel lights up, if the
<emergency stop> is activated. Continue
sectioning, pull out the red button. The cutting drive
can be started again.
The second emergency stop device is integrated
into the foot pedal. Vigorously step on the foot
pedal to immediately stop the motorized cutting
drive.This emergency stop device is activated as
long as the foot pedal is being stepped on. During
this time, the red LED STOP (fig. 5.4) on the
operating panel lights up. Continue sectioning,
release the foot pedal. The cutting drive can be
started again.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-7
INDICATION OF CUTTING
PROCESSES
In the lower line of the display (fig. 5.7) information
about the sectioning status can be seen. Press the
<scroll button> (fig. 5.2), to show the various
functions one after the other on the display.
The following information about the present
sectioning position of the instrument can
alternatively be seen in the lower line of the display
(fig. 5.7):
- number of sections
- sum of section thicknesses
- remaining travel to the front end
position
For this, press button (fig. 5.2) until the required
information lights up on the display (fig. 5.7).
If no information is required in this line, press
button (fig. 5.2) until this line of the display (fig.
5.7) is blank.
2-7-1 SECTION COUNTER
The section counter adds up the number of sections
produced. After each downward movement of the
specimen holder, the number on the section counter
increases by 1. The counter can be reset to zero by
means of the button (fig. 5.3).
2-7-2 SUM OF SECTION
THICKNESSES
This value shows the sum in microns of the
sections already cut. Trimming values as well as
sectioning values are added up.
This value can also be reset to zero by means of
the button (fig. 5.3).
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
2-7-3 REMAINING TRAVEL TO
FRONT END POSITION
This value shows the distance in microns, which is
left for sectioning.
If the specimen holder is in the back end position,
the display shows 28 000 µm. This number
decreases the closer the specimen comes towards
the front. If no further feed is possible anymore,
the lower line of the display switches over
automatically to the remaining travel indication,
independently which information about the
sectioning position was chosen before.
Rotary Microtome HM 355 S
2-8
TURNING OFF THE FUNCTION
<RETRACTION>
If desired, the function <retraction> can be turned
off. This can be achieved by pressing the buttons
(fig. 5.3 and 5.13) on condition that the lower line
of the display (fig. 5.7) is blank.
The letter R (last line on the right side on the
display) does not light up anymore.
The yellow LED RETRACTION, however, might
still be on and goes off only after having passed
from the return travel again to the cutting
movement.
To turn on again the function <retraction>, press
button (fig. 5.3) together with button (fig. 5.13),
while the lower line on the display is blank.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
2-9
SELECTING THE INDICATED
LANGUAGE
The sectioning information on the display can be
shown alternatively in three languages. English,
German and French are available.
The instrument must be turned off. To select one
of these languages, press buttons (fig. 5.2 and 5.3)
simultaneously. Then turn on the power switch of
the instrument with still pressed buttons (fig. 5.2
and 5.3). As the first suggestion LANGUAGE
DEUTSCH lights up on the display (fig. 5.7). To
select another language, press button (fig. 5.2)
once or twice until the desired language is shown.
To confirm the desired language, press the button
(fig. 5.3) and turn off the instrument on the power
switch. Wait a few seconds and then turn on the
instrument again. The display (fig. 5.7) now shows
the terms in the desired language.
If the originally desired language was skipped over
by mistake, turn off the instrument and repeat
above described process.
If the button (fig. 5.2) is pressed more than twice
passing the language selection process, the user
has entered the service-routine-program. This
program can only be operated by trained service
technicians. To terminate this program, turn off the
power switch of the instrument.
Rotary Microtome HM 355 S
2-10
SPECIMEN CLAMPING
2-10-2 STANDARD SPECIMEN CLAMP
To clamp specimens, different specimen clamping
systems are available. With the orienting adapter it
is simple to align the specimen properly in relation
to the knife.
The standard specimen clamp (fig. 8) is used for
rectangular and square paraffin and plastic blocks.
2-10-1 UNIVERSAL CASSETTE CLAMP
The universal cassette clamp (fig. 7) represents a
quick change system.
Fig. 8
Insert the specimen against the fixed jaw (fig. 8.2)
first. Then turn the knob (fig. 8.3) to tighten the jaw
(fig. 8.1). Fig. 8.4 and 8.5 show the orienting
adapter (see 2-11-2, adapter, orienting, specimen
orientation), fig. 8.6 indicates the four holes for the
fastening screws.
Fig. 7
To insert or remove the cassette from between the
fixed (fig. 7.1) and movable (fig. 7.2) jaws, pull the
lever (fig. 7.3) to the front.
NOTE! For the stability of the specimen, do not let
it project over the clamping jaws too much.
CAUTION! To achieve an optimal clamping keep
the locating surface of the cassette free of
paraffin.
The standard specimen clamp is supplied with two
movable jaws, which are different in weight.
The lightweight jaw is used in addition with inserts
for round specimens.
The heavier jaw is intended to be used together
with the standard specimen clamp with no other
holding elements.
To exchange the clamping jaw, unscrew the
clamping screw (fig. 8.3) to remove the jaw and
replace it with the other one.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-10-3 INSERT FOR ROUND
SPECIMENS, V-INSERT AND
V-DISTANCE PIECE
2-10-4
FOIL CLAMP
The foil clamp (fig. 10) is a clamping system for
foils or thin specimens. To insert the specimen,
loosen the three clamping screws (fig. 10.5) slightly
and push the movable jaw (fig. 10.2) sideways
against the two springs (fig. 10.3). The specimen is
kept in place by the springs. For a new alignment
its position can be changed. Turn the three
clamping screws (fig. 10.5) to clamp the specimen
tightly.
Fig. 9
To cut round specimens, the insert for round
specimens (fig. 9 A) with defined diameters of 6,
15 and 25 mm (special sizes on request), the Vinsert (fig. 9 B) or the V-distance piece (fig. 9 C)
can be clamped into the standard specimen clamp.
The pin (fig. 9.3), which fits into the lower
clamping jaws (fig. 8.1), positions the insert
precisely. The two springs (fig. 9.4) make it easy to
remove the specimen from the inserts (fig. 9.1 and
9.2).
To insert the V-distance piece (9 C) against the
fixed jaw (fig. 8.2) of the standard specimen clamp,
first unscrew the knob from the spindle and pull the
spindle out of the clamp. After having inserted the
V-distance piece, put in the spindle and turn the
knob (fig. 8.3) on the spindle.
When using an orienting adapter with the
instrument, first insert the enclosed graduated ring
into the orienting adapter by means of the pin. With
the graduated ring the orientation in X-/Y-direction
is annulled. However, it is possible to turn in Z-axis
60° in either direction. Then mount the foil clamp.
Fig. 10
According to the various specimens, it might be
helpful to use in addition MICROM's sandwich
supporting material (cat. no. 176010) on the right
and left side between specimen and clamping jaw.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-10-5 SEGMENT ARC AND
UNIVERSAL SPECIMEN
HOLDER
The segment arc and universal specimen holder are
highly suitable for the clamping of small specimens
embedded in plastic (fig. 11).
Fig. 11
The specimen is inserted in the holder (fig. 11.1)
and clamped by means of the screw (fig. 11.2)
with the hex head wrench (fig. 11.3). Then the
holder together with the specimen is put into the
segment carrier (fig. 11.5), where the holder can
be turned 360°. Thus, the specimen can be aligned
as required. Then, the holder is clamped by means
of the screw (fig. 11.4) in the selected position.
The carrier (fig. 11.5) can be moved on the base
(fig. 11.6). In this way, the surface of the specimen
can be oriented parallel to the knife. The knurled
screw (fig. 11.7) is used to tighten the carrier (fig.
11.5) on the base (fig. 11.6).
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-11
ADAPTERS FOR SPECIMEN CLAMPING
2-11-1 ADAPTER, NON-ORIENTING
This adapter replaces the specimen holder and
serves for the non-orienting fastening of the
specimen clamps directly on the feed cylinder.
NOTE! To avoid undesirable movement while
adjusting the specimen, press the eccentric lever
upwards slightly. This will lightly hold the specimen
clamp.
2-11-2 ADAPTER, ORIENTING,
SPECIMEN ORIENTATION
CAUTION! The spring bolt (fig. 12.3) must
always be tightened to keep the adjusting screws
under constant tension.
Using the orienting adapter (fig. 7.4 and 7.5) fasten
the specimen clamps on the feed cylinder. This
allows the specimen to be aligned in relation to the
knife.
2-11-3 CHANGING AND/OR
CLAMPING SPECIMEN
CLAMPS
The available specimen clamps are all clamped or
removed in the same way.
To change a specimen clamp, press the eccentric
lever (fig. 12.1) downwards and pull it sideways in
the direction of the arrow. Slightly unscrew the two
adjusting screws (fig. 12.2) as well as the spring
bolt (fig. 12.3).
Now the specimen clamp can be pulled out and can
be replaced with another specimen clamping
system.
Fig. 12
To bring the specimen into the desired position, turn
the eccentric lever (fig. 12.1) to the front. This will
loosen the specimen clamp and a rotation of 360°
on the cylinder axis (Z-axis) is possible. With the
two adjusting screws (fig. 12.2) the specimen
clamp can be oriented by 8° in each direction on
the X-axis and Y-axis. Before starting cutting,
press the eccentric lever (fig. 12.1) upwards to fix
the orientation of the specimen.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Insert the new specimen clamp into the specimen
holder so that the clamping lever can be put
through the hole of the adapter (fig. 7.5) from the
right side all the way through. Tighten spring bolt
(fig. 12.3). Then align the specimen clamp by
means of the orienting screws (fig. 12.2). Then
press the clamping lever (fig. 12.1) upwards (see
2-11-4, readjusting specimen clamps).
Rotary Microtome HM 355 S
2-11-4 READJUSTING SPECIMEN
CLAMPS
Frequent use of the clamping lever (fig. 12.1) can
lead to the fact that the specimen clamps cannot be
clamped optimally anymore. If the necessary
readjustments are not carried out, it might even be
possible that the specimen clamp cannot be
clamped anymore by means of the clamping lever
(fig. 12.1).
The clamping lever (fig. 12.1) should be in an
almost upright position. To determine the clamping
position of the clamping lever, adjust the inner
screw (fig. 13.1) on the rear side of the orienting
adapter by means of an allen key
(size 3 mm).
Turn the allen key in a clockwise direction if no
clamping was achieved at all or if the clamping
position of the clamping lever is too high.
If the clamping position of the clamping lever is too
low, turn the allen key in a counter-clockwise
direction.
Fig. 13
Then insert the specimen clamp and check
clamping position. If necessary, repeat abovedescribed process.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-12
KNIFE CARRIERS
The knife carriers of the microtome are easy to use, can be moved sideways and are equipped with knife
guards for user safety while adjusting knife and specimen. A dovetail guide is screwed on the base plate. It is
designed universally so that the different knife carriers can be clamped and moved to the front and the back.
2-12-1 STANDARD KNIFE CARRIER N
a)
Inserting the knife
To insert the knife, unscrew the two clamping
screws (fig. 14.9) slightly until the knife can be
pushed in from the side. The height of the knife is
adjusted by the two knurled nuts (fig. 14.6) and the
bar (fig. 14.7). If a cutting area of the knife is no
longer usable, the knife can be moved approx. 2-3
cm to the left or right side by loosening the
clamping screws (fig. 14.9).
b)
Adjusting clearance angle
The clearance angle between cutting edge and
specimen can be shifted and adjusted to the
requirements of the tissue to be sectioned. Loosen
the clamping lever (fig. 14.4) on the right side of
the knife carrier and move the upper part of the
knife carrier (fig. 14.2) on the knife carrier base
(fig. 14.1). The adjusted clearance angle can be
read on the scale. Then turn the clamping lever
(fig. 14.4) upwards to lock in the new cle arance
angle.
NOTE! By experience, usable cuts are only
achieved at a clearance angle of 10° or more.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
If the clamping lever (fig. 14.4) is loosened, the
upper part of the knife carrier can be moved
1 cm to the left or right side. This way, the cutting
edge can optimally be used.
c)
Moving the knife carrier
on the dovetail guide
Loosen the clamping lever (fig. 14.5) on the left
side of the knife carrier to move the carrier
forwards or backwards on the dovetail guide. This
allows a rough adjustment of the knife to the
specimen.
d)
Protection against injury
The knife carrier is equipped with two knife guards
(fig. 14.8) that can be moved sideways. They
should be pushed together to the middle while the
knife and specimen are adjusted. In this way, the
danger of injury from the knife can considerably be
diminished.
Rotary Microtome HM 355 S
9
3
8
3
7
10
10
5
2
1
6
4
Fig. 14
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-12-2 DISPOSABLE BLADE CARRIER E
a)
Inserting the blade
The disposable blade carrier E is designed to take
all commercially available high and low profile
blades. Insert the blade into the slot behind the
clamping plate (fig. 15.5). When using high profile
blades, first loosen the two screws (fig. 15.9) and
remove the spacer strip (fig. 15.3).
Turn the clamping lever (fig. 15.7) to the front.
Swing the bracket with scale (fig. 15.4) to the
front. Loosen the clamping lever (fig. 15.7) and, if
necessary, slightly press the lower part of the
clamping plate as well. A small gap between rail
(fig. 15.3) and clamping plate (fig. 15.5) can be
seen. Insert the blade on the rail (fig. 15.3) and
push it from the side to the middle. Afterwards,
return the clamping lever (fig. 15.7) upright, thus
locking the blade in position.
The bracket (fig. 15.4) is provided with a scale.
After loosening the clamping lever (fig. 15.7) and
after having moved the bracket (fig. 15.4) upwards,
move the blade together with clamping plate (fig.
15.5) according to the scale by means of the knife
guard to the left or right side. This way, the entire
cutting length of the blade can be used. Then press
the clamping lever (fig. 15.7) upwards.
b)
Adjusting clearance angle
The clearance angle between cutting edge and
specimen can be shifted and adjusted to the
requirements of the tissue to be sectioned. Loosen
the clamping lever (fig. 15.8) on the right side of
the knife carrier and move the upper part of the
knife carrier (fig. 15.2) on the base (fig. 15.1). The
adjusted clearance angle can be read on the scale.
Then turn the clamping lever (fig. 15.8) upwards to
lock in the new clearance angle.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
NOTE! By experience, usable cuts are only
achieved at a clearance angle of 10° or more.
If the clamping lever (fig. 15.8) is loosened, the
upper part of the knife carrie r can be moved
1 cm to the left or right side. This way, the cutting
edge can optimally be used.
c)
Moving the knife carrier on the
dovetail guide
Loosen the clamping lever (fig. 15.6) on the left
side of the knife carrier, to move the carrier
forwards or backwards on the dovetail guide. This
allows a rough adjustment of the knife to the
specimen.
d)
Protection against injury
A bracket (fig. 15.4) on the clamping plate can be
moved upwards over the blade for the protection
against injury.
Rotary Microtome HM 355 S
5
4
9
3
1
2
3
4
5
6
7
2
7
6
0
10
1
8
Fig. 15
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-12-3 KNIFE CARRIER C
a)
Inserting the knife
To insert the knife, the clamping screws (fig.
16.10) must be unscrewed slightly so the knife can
be pushed in from the side. The height of the knife
is adjusted with the two knurled nuts (fig. 16.6) and
the bar (fig. 16.7). If the cutting zone of the knife
cannot be used anymore, it can be moved over its
entire length to the left and right side by loosening
the clamping screws. This allows an optimal use of
the entire knife edge.
CAUTION! When clamping the knife, please
tighten the two clamping screws (fig. 16.10)
simultaneously.
b)
c)
Moving the knife carrier on the
dovetail guide
Loosen the clamping lever (fig. 16.5) on the left
side of the knife carrier to move the carrier
forwards and backwards on the dovetail guide.
This allows a rough adjustment of knife and
specimen.
d)
Protection against injury
The knife carrier is equipped with two knife guards
(fig. 16.9) which can be moved sideways. These
knife guards should be pushed together in the
middle while adjusting knife or specimen. This
reduces the danger of injury considerably.
Adjusting clearance angle
The clearance angle between cutting edge and
specimen can be shifted and adjusted to the
requirements of the tissue to be sectioned. Loosen
the clamping lever (fig. 16.4) on the right side of
the knife carrier and move the upper part of the
knife carrier (fig. 16.2) on the base (fig. 16.1). The
adjusted clearance angle can be read on the side
scale. Then turn the clamping lever (fig. 16.4)
upwards to lock in the new clearance angle.
e)
NOTE! By experience, usable cuts are only
achieved at a clearance angle of 10° or more.
clamping plate c for c-knives,
clamping plate d for d-knives.
If the clamping lever (fig. 16.4) is loosened, the
upper part of the knife carrier can be moved
1 cm to the left or right side. This way, the cutting
edge can optimally be used.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Central clamping plate
The knife is clamped and stabilized in the cutting
zone by the central clamping pla te (fig. 16.8.1,
16.8.2) - exactly where the highest cutting forces
are applied.
NOTE ! Two types of clamping plates are
available for the knives:
Rotary Microtome HM 355 S
3
9
8.2
8.1
10
3
9
5
10
2
1
6
7
6
4
Fig. 16
Fig. 17 shows schematically the angles on the
cutting edge profiles of c- and d-knives.
Fig. 17
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-12-4 KNIFE CARRIER S
a)
Inserting the knife
The knife carrier S is designed to take triangular
glass knives, diamond and sapphire knives. These
knives are put into the knife insert (fig. 18.8) and
clamped with the clamping screw (fig. 18.9). The
black arrows in fig. 18 show the clamping direction
of the various clamping devices.
d)
Loosen the clamping screw (fig. 18.4) to move the
carrier to the left or right side on the socket up to
approx. 30° according to the bowed orientation
scale. Afterwards, tighten the clamping screw (fig.
18.4) again.
e)
b)
Adjusting clearance angle
The clearance angle adjustment of the knife can be
set by moving the insert (fig. 18.8) on the upper
part (fig. 18.5). Turn the clamping lever (fig. 18.10)
downwards to lock in the selected clearance angle.
c)
Moving the knife sideways
Move the knife carrier together with the upper part
(fig. 18.5) sideways.
Thus, the desired position concerning the specimen
can be adjusted. Loosen the knurled screw (fig.
18.7) slightly. Turn one of the two set screws (fig.
18.6) to achieve the desired side movement of the
upper part (fig. 18.5) with regard to the carrier (fig.
18.3). Tighten the knurled screw (fig. 18.7) slightly
after this positioning.
CAUTION! If the knurled screw (fig. 18.7) is
tightened, do not adjust the set screws (fig. 18.6)
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Turning the carrier
Moving the knife carrier
on the dovetail guide
Swing the clamping lever (fig. 18.2) to the back to
release the knife carrier. The knife carrier can then
be moved forwards or backwards.
Rotary Microtome HM 355 S
9
11
8
10
5
6
3
6
4
10
20
30
1
7
2
Fig. 18
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-12-5 READJUSTING KNIFE
CARRIERS N, E AND C
Frequent use of the clamping levers can lead to the
fact that the knife carriers cannot be clamped
optimally anymore. If the necessary readjustments
are not carried out, it might even be possible that
the knife carriers cannot be clamped anymore.
If possible, the clamping lever should be in a 45°position towards the front (fig. 19).
Fig. 20
2-12-6
READJUSTING KNIFE
CARRIER S
Readjusting the clamping lever (fig. 18.2) of the
knife carrier S can also become necessary.
Fig. 19
If the clamping lever is in an unfavourable clamping
position, i.e. not in a 45°-position, remove knife
carrier. Loosen the set screw (fig. 20.1) on the
bottom of the knife carrier. Insert a pin into one of
the holes (fig. 20.2) that can be seen in the brass
screw and turn the brass screw.
If the clamping position of the lever should be
moved towards the front, turn the brass screw (fig.
20.2) in a clockwise direction. If the clamping
position of the lever should be moved towards the
back, turn the brass screw (fig. 20.2) in a counterclockwise direction. Before putting on the knife
carrier again, tighten set screw (fig. 20.1).
Then put the knife carrier on the dovetail guide and
check the clamping position of the clamping lever.
If necessary, repeat above-mentioned process.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
If the clamping lever is in an unfavourable position,
i.e. not in a 45°-position, remove the knife carrier.
Loosen or tighten the set screw on the bottom of
the knife carrier to change the clamping position of
the lever.
If the clamping position of the lever should be
moved towards the front, turn the set screw in a
clockwise direction. If the clamping position of the
lever should be moved towards the back, turn the
set screw counter-clockwise.
Then slide the knife carrier on the dovetail guide
and check the clamping position of the lever. If
necessary, repeat above-mentioned process.
Rotary Microtome HM 355 S
2-13
SECTION WASTE TRAY WITH
INTEGRATED ARM REST
The section waste tray with integrated arm rest
surrounds the knife carrier area. It can easily be
cleaned and allows non-tiring working with the
microtome. It can easily be removed to the front.
2-15
BACKLIGHTING SYSTEM
The adjustment between specimen and cutting
edge is facilitated considerably by the backlighting
system. The small gap between knife edge and
specimen is illuminated and thus better visible. The
backlighting system is fastened to the rear side of
the base of the knife carrier by means of two
screws.
The plug of the supply cord is connected to the
socket on the right front side of the microtome.
Fig. 22
2-14
STORAGE UNIT
The storage unit, which can be cooled, can be
installed on the left side of the instrument instead of
the operating panel. It can also be used
freestanding as a separate unit. For this, insert the
attached support on the rear bottom of the storage
unit.
CAUTION! Loosen the connecting cable on the
right side of the instrument, before removing knife
carrier or backlighting system.
The four tubes (fig. 23.1), which are placed in the
rear part of the storage unit, can be used for storing
brushes, tweezers and other working instruments.
The tubes can be removed for cleaning.
Before using the insert (fig. 23.2) for cooling
cassettes, put it into the deep freezer.
This way, specimens can be kept cool for a certain
time.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Fig. 23
Rotary Microtome HM 355 S
2-16
SPECIMEN APPROACH METHODS
To facilitate routine work for the user, the rotary
microtome HM 355 S is equipped with two
functions for the fast and exact approach of knife
edge and specimen.
2-16-1 MEMORY FUNCTION
The memory function is used to quickly find again
the same position for the first cuts.
This function can only be used on condition that
blocks, which have been embedded in the same
molds, are cut. The blocks must have almost the
same height.
To set the so-called "first-cut-position", move the
specimen clamping via coarse feed function
forwards until the specimen is almost situated at
the knife edge.
To store this position, first press the reset button
(fig. 5.3). Then also press the button A (fig. 5.9)
while the reset button (fig. 5.3) is still being
pressed.
Then continue routine sectioning (trimming, first
cuts, fine sectioning). After having finished
sectioning of the block, press button (fig. 5.9) so
that the specimen clamping moves backwards.
Then unclamp the specimen.
To have more space between knife edge and
specimen when changing the specimen, a safety
distance (from 0 - 7 mm) can be selected besides
the selection for the first-cut-position.
For this, turn off the instrument. Then press button
A (fig. 5.9) and turn on the power switch of the
instrument with still pressed button A (fig. 5.9).
The user has now entered a menu for selecting the
safety distance.
Press the scroll button (fig. 5.2) until the desired
value is selected. To acknowledge the safety
distance, press the reset button (fig. 5.3).
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
When the first-cut-position as well as the safety
distance have been stored, please proceed as
follows:
Clamp the specimen and press the button A (fig.
5.9) once. The specimen clamping moves towards
the knife carrier to the first-cut-position.
Afterwards, continue with routine sectioning.
After having finished sectioning of the block, press
button A (fig. 5.9) once more. Now the specimen
clamping moves backwards to the first-cut-position
plus the selected safety distance.
After having inserted a new block and having
pressed the button A (fig. 5.9), the specimen
clamping moves forwards to the first-cut-position.
CAUTION! The stored cutting position can only
be used effectively when blocks with the same
height are cut. Neither adjustments on the knife
carrier must be made nor must the knife carrier be
moved on the dovetail guide.
DANGER! When moving the knife carrier on the
dovetail guide, a new first-cut-position must be
selected as otherwise the danger of a collision with
injuries might arise.
When turning on the instrument later again, the
first-cut-position must be defined and stored again
for safety reasons.
Rotary Microtome HM 355 S
2-16-2 AUTOMATIC APPROACH
SYSTEM
The automatic approach system is used for the fast
and exact approach of the specimen (fig. 24.2)
towards the knife edge (fig. 24.1). Fig. 24 shows
the position of the sensor (fig. 24.3) at the
beginning of the automatic approach process.
After this process, turn the handwheel and thus the
specimen holder into the upper position. Then the
automatic coarse feed moves the specimen holder
forwards again to carry out a certain correction
value.
Install the automatic approach system by means of
the two visible screws on the rear side of the knife
carrier base (alternatively same installation position
as the backlighting system) and connect it to the
socket on the right front side of the instrument.
The distance between specimen and knife edge is
now very small. When the automatic approach is
finished, the instrument switches automatically over
to the <permanent function> trimming. This way,
trimming can be continued immediately.
Clamp the specimen, adjust the knife carrier and
check all clamping levers.
The user can determine the above-mentioned
correction value at any time again.
This might be necessary when the automatic
approach system was removed, knife carriers have
been exchanged or if the knife was adjusted in a
different way.
To determine the correction value again, turn the
handwheel handle into the lower position. Press
button A (fig. 5.9). The specimen holder with
specimen is now moved forwards to a switching
point by means of the coarse feed. After having
reached the switching point, the coarse feed turns
off automatically. Then turn the handwheel to bring
the specimen holder together with the specimen
into the middle position.
Fig. 24
Now, turn the handle of the handwheel to the lower
position, i.e. the specimen holder together with the
specimen is also in the lower position.
Press button A (fig. 5.9) on the operating panel to
start the automatic approach process. The red
LED in button (fig. 5.9) lights up continuously. If
the LED in button (fig. 5.9) flashes only, this means
that the automatic approach was selected, but not
yet started. In this case, turn the handwheel further
to the lower position until the LED in button (fig.
5.9) lights continuously.
Now the specimen holder together with the
specimen moves forwards until a certain point is
reached. The automatic approach system then
turns off.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
If required use the functions <coarse feed
forwards> (fig. 5.16), <trimming> (fig. 5.14) as
well as <coarse feed backwards> (fig. 5.15) to
carry out a specific approach up to the desired
distance between specimen and knife edge.
Then turn the handwheel handle into the upper
position. In this case, further forward movements
of the specimen holder are not carried out. The
sum of the forward and backward movements,
which were carried out by means of the abovementioned functions, is now stored as a new
correction value. This value is now valid for all
future automatic approaches until a new correction
value is stored again.
Rotary Microtome HM 355 S
CAUTION! The permanent functionality of the
automatic approach system is only guaranteed
when the working process is not disturbed by
section waste. Therefore, keep the automatic
approach system itself as well as the direct
surrounding area clean.
If the button (fig. 5.9) is pressed, although the
automatic approach system is not installed or not
yet ready for work, the display (fig. 5.7) shows NO
APPROACH. Again press button (fig. 6.9) to
delete this information. Then continue working as
usual without the automatic approach system.
CAUTION! Loosen the connecting cable on the
right side of the instrument, before removing knife
carrier or automatic approach system. For this, pull
off the grooved grip of the connector directly on
the housing to loosen the connecting lock.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-17
LARGE FIELD MAGNIFIER
The large field magnifier (fig. 25) is for looking at
section production.
The light is connected to the power outlet with the
power cord (fig. 25.2) and turned on and off with
the switch (fig. 25.3).
CAUTION!
Before using the large field
magnifier for the first time, please check if the
voltage conditions at the installation site comply
with the power requirements and frequency
mentioned on the supply unit of the magnifier.
Fig. 25
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
Installing the magnifier on the microtome
Please use the enclosed fastening elements to
attach the magnifier to the microtome. Remove the
front plastic caps from the upper side of the front
panel.
If there are no drilled holes in the front panel, it
must be replaced with a new one with drilled holes.
Fasten the peg (fig. 25.4) to the plate (fig. 25.6)
with the screw (fig. 25.7). Carefully introduce the
four sleeves (fig. 25.8) into the drilled holes with
the screws (fig. 25.5).
CAUTION! Please make sure that the sleeves
(fig. 25.8) do not fall into the interior of the
microtome.
CAUTION! Make sure the plate (fig. 25.6) is
mounted in a way that the peg (fig. 25.4) is closer
to the front of the microtome.
Put the plate (fig. 25.6) on the sleeves and fasten it
to the microtome with four screws (fig. 25.5).
A movable plastic socket that should be put on the
peg (fig. 25.4) is on the under side of the magnifier.
The magnifier can be adjusted forwards and
backwards for the most favorable viewing position.
If the large field magnifier is not used, slightly raise
it and turn it sideways on the peg.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
2-18
STANDARD EQUIPMENT
The Rotary Microtome HM 355 S is supplied with the following accessories:
1 Hex head wrench 6 mm
1 Cover
1 Para Gard, 100 ml
1 Instruction manual
The knife carriers and specimen clamps are not included in the standard equipment.
2-19
ADDITIONAL EQUIPMENT
(OPTIONAL)
2-19-1 KNIFE CARRIERS
Cat. no.
Standard knife carrier N
705010
Standard knife carrier N for Ralph insert
705400
Standard knife carrier SN
705060
Insert for Ralph knife for standard knife carrier N
565310
Disposable blade carrier E
705050
Disposable blade carrier ER
705100
Knife carrier C
705040
Knife carrier SL
705350
Knife carrier S
705070
Insert for Ralph knife for knife carrier S
565320
2-19-2 SPECIMEN CLAMPS
Standard specimen clamp
715010
Universal cassette clamp
715020
Foil clamp
715030
Sandwich supporting material
176010
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
Insert for round specimens, ø 6 mm
Insert for round specimens, ø 15 mm
Insert for round specimens, ø 19 mm
Insert for round specimens, ø 25 mm
715070
715080
715280
715090
V-Insert
715100
V-distance piece
715320
Segment arc
715050
Universal specimen holder
715060
2-19-3 OPTICAL ACCESSORIES
Large field magnifier, 230 V
Large field magnifier, 120 V
760160
760170
Stereomicroscope Stemi 2000
755210
Adapter for Stemi 2000
532090
KL 1500 with ring light
230 V, 50 - 60 Hz
120 V, 50 - 60 Hz
760280
760290
Special light for semithin sectioning techniques
100 V, 50 - 60 Hz
115 V, 50 - 60 Hz
220 - 230 V, 50 - 60 Hz
240 V, 50 - 60 Hz
630180
630170
630160
630190
Backlighting system
630130
2-19-4 MICROTOME KNIVES
Conventional knives type c
12 cm
16 cm
18,5 cm
22 cm
152010
152020
152270
152030
Conventional knives type d
12 cm
16 cm
22 cm
152060
152070
152080
Tungsten carbide knife, 16 cm, d
152120
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
Knife cases
12 cm
16 cm
18,5 cm
22 cm
152220
152230
152280
152240
Disposable blades for paraffin
S 35, 50 pieces in dispenser
R 35, 50 pieces in dispenser
152170
152370
Superlap blades, 10 pieces
152190
2-19-5 ADDITIONAL ACCESSORIES
Fast freezing unit K 300
100 V, 50 - 60 Hz
115 V, 60 Hz
230 V, 50 Hz
240 V, 50 Hz
770080
770070
770030
770090
Section transfer system STS
100 V, 50 - 60 Hz
115 V, 60 Hz
230 V, 50 Hz
240 V, 50 Hz
771030
771020
771010
771040
Storage unit
520450
Automatic approach system
604120
Lubricating oil, 100 ml
Lubricating oil, 250 ml
350110
350120
Paraffin repellent, PARA GARD, 100 ml
350170
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
PART 3
3-1
THEORY OF OPERATION
CUTTING MOVEMENT AND
RETRACTION
The rotary movement of the handwheel of the
HM 355 S results in the vertical movement of the
specimen clamp. This rotary movement is carried
out either manually or by means of the motorized
cutting drive.
Sectioning is carried out by knives or blades, which
must be adjusted and fixed on the knife carrier.
With the downward movement of the specimen,
sectioning is carried out (cutting movement).
The upward return travel of the specimen is carried
out by turning the handwheel further in a clockwise
direction. During this return travel, the specimen is
drawn back automatically to protect knife and
specimen. If required, the function <retraction> can
be turned off.
The selected section thickness is delivered at the
upper reversal point of the return travel.
The number of the sections made can be shown on
the section counter on the display. After each
downward movement of the specimen holder, the
number on the section counter increases by 1. The
sum of the sections carried out can also be seen on
the display. For this, trimming values and sectioning
values are added up. Section counter and sum of
section thicknesses can be reset to zero at any time
by means of the RESET-button.
Moreover, the remaining travel to the front end
position can also be shown on the display. The
remaining travel, which is still available for
sectioning, is shown in microns. If the specimen
holder is in the back end position, the display shows
28 000 µm. This number decreases, the further the
specimen holder is moved towards the front. (See
2-7, indication of cutting processes).
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
3-2
SPECIMEN COARSE FEED
AND TRIMMING FUNCTION
After changing the specimen or moving the knife or
knife carrier, it is necessary to adjust the specimen
to the knife edge again. This can easily be done by
means of the specimen coarse feed and the defined
trimming values. After the specimen and the knife
are adjusted, further gradual feed for trimming can
be carried out by pressing the button for trimming,
which is available as pulse or permanent function.
If the <pulse function> is chosen, the specimen
holder moves forwards by the pre-selected
trimming value whenever pressing the button for
trimming. If the <permanent function> is chosen,
the feed is carried out in the upper reversal point at
each handwheel rotation.
3-3
OPERATING PANEL
AND FOOT PEDAL
The operating controls of the panel are well
arranged for safe and easy use. The operating
panel can be removed from the instrument at any
time and used as a separate unit. In addition, the
cutting movement can be started and stopped by
means of the foot pedal.
3-4
SPECIMEN CLAMPING
SYSTEM AND SPECIMEN
ORIENTATION
According to the form and size of the specimens,
different specimen clamping systems are available
to carry the specimen.
It is very easy to align the specimen to the knife,
using the orienting adapter.
Rotary Microtome HM 355 S
3-5
KNIFE CARRIERS
The knife carriers are easy to use. They allow the
microtome knives to be clamped and adjusted as
needed. Depending on application, special knife
carriers are available.
3-6
MICROTOME WITH
FREEZING UNIT
The freezing unit K 300 allows frozen sectioning
with the specimen temperature as low as -45°C.
3-7
AUTOMATIC APPROACH
SYSTEM
The automatic approach system is used for easy
approach of a specimen to the knife edge from any
distance.
When choosing the automatic approach system, a
sensor tilts towards the specimen and releases a
forward movement of the coarse feed. The coarse
feed turns off when a certain point is reached.
After that, the sensor flag tilts back against the rear
of the knife to give enough clearance for the
sectioning movement.
When passing the next upper reversal point another
coarse feed movement used as a correction value
is released. This way, the approach up to a minimal
distance of the knife edge to the specimen is
possible. If desired, the user can determine the
correction value by means of the coarse feed
functions on the operating panel (see 2-16,
automatic approach system).
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Rotary Microtome HM 355 S
PART 4
4-1
WORKING WITH THE MICROTOME
PREPARATION AND
ORIENTATION
Before sectioning, the specimens must be prepared
appropriately and embedded in suitable media. The
universal cassette as well as different forms for
round or rectangular specimens can be used for the
embedding. With the orienting adapter and cylinder
head, the specimen can easily be oriented to the
knife. (See 2-11-2, adapter, orienting, specimen
orientation).
4-2
COARSE FEED AND
TRIMMING FUNCTION
The knife carrier can be moved and the coarse
feed or the trimming function can be used to adjust
approximately the space between specimen and
knife edge. If the instrument is equipped with an
automatic approach system, this process can also
be carried out by using the automatic approach
system.
Turning the handwheel in a clockwise direction
results in the first contact between knife and
specimen. Continue this to start trimming the
specimen thus achieving the desired level. Any
waste should be wiped away in an upward
direction with a brush.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
4-3
SECTIONING INSTRUCTIONS
To cut usable sections, the following points are of
utmost importance:
4-3-1 CONDITION OF THE KNIFE
EDGE
Only use a sharp knife! If the knife edge is blunt,
move the knife horizontally either to the right or left
side to continue working with the sharp area of the
cutting edge, or have the knife resharpened.
4-3-2 CLEAN KNIFE SURFACES
For optimal sectioning, the front and back of the
knife must be cleaned of paraffin waste.
Rotary Microtome HM 355 S
4-4
HOW TO AVOID MALFUNCTIONS
4-4-1 PREPARATION OF THE
SPECIMEN
4-4-5 ADJUSTMENT OF THE KNIFE
When preparing specimens, be sure that a suitable
embedding medium, fixation, dehydration and
infiltration time are chosen.
Take care to adjust the proper clearance angle of
the knife: 5 - 7° for glass knives. For diamond
knives ask the knife manufacturer.
4-4-2 TEMPERATURE OF THE
SPECIMEN
Select a clearance angle adjustment
5 - 15° according to the facet angle.
of
Take care to adjust knife height.
Sectioning is carried out at ambient temperature
(excluding frozen sections). If the temperature is
too high, the paraffin softens. Therefore, avoid
heating paraffin specimens by direct exposure to
sunlight or other sources of heat.
4-4-3 TIGHTENING THE
CLAMPING SCREWS
Tighten all clamping screws and clamping levers on
the knife carrier as well as specimen holder and
specimen orientation.
4-4-4 SELECTION OF THE KNIFE
Carefully select the required knife material and
profile.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
4-4-6 CUTTING SPEED
Take care to select proper cutting speed.
General Rule: The harder the material, the slower
the cutting speed!!
4-4-7 TRIMMING
Take care in bringing knife and specimen together.
Rotary Microtome HM 355 S
PART 5
MAINTENANCE
Annual routine maintenance
To secure section quality and functioning of the
microtome, it is recommended that a routine
maintenance be performed by a trained service
technician once a year.
Service contract
MICROM offers a service contract which
guarantees that your instrument is always in
perfect condition. For more information, please
contact the nearest MICROM sales office.
Exchange of fuses
The two mains fuses (fig. 26.3) are installed on
the rear side of the instrument beside the power
switch (fig. 26.1).
To exchange the two fuses, turn off the power
switch of the instrument and unplug the
instrument. Open the fuse holder (fig. 26.2) from
the left side by means of a flat screw driver. Pull
the fuses off the fuse holder and replace the fuses
with new ones.
Rating of fuses:
For power requirements: 220-240 V:
- 2 fuses 1,6 AT slow-blow (cat. no. 326670)
For power requirements: 100-120 V:
- 2 fuses 3,2 AT slow-blow (cat. no. 326660)
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Fig. 26
Exchange of fuse for the motor supply
The fuse for the motor supply (fig. 26.4) is placed
on the rear side of the instrument on the right side
of the mains plug unit and secures the supply
voltage of the cutting drive.
To exchange the two fuses, turn off the power
switch of the instrument and unplug the
instrument.
Press the fuse holder cap by means of a
screwdriver and turn it to the right side.
Remove the fuse and replace it with a new one.
Insert the cap with the fuse into the fuse holder
and lock the bajonet catch.
Rating of fuse:
- 1 fuse 5,0 AT, slow-blow (cat. no. 326350)
Rotary Microtome HM 355 S
PART 6
CLEANING AND CARE
Cleaning intervals
Care
Cleaning of the microtome depends on how
frequently the microtome is used. The more it is
used, the more it will need to be cleaned.
Remove the knife from the knife carrier. Clean it
and keep it in a knife case.
CAUTION! Never put the knife with the cutting
edge upward on the table.
Cleaning agents
Mild household cleaners can be used to clean the
microtome. Do not use aggressive cleaners or
solvents, as the paint and plastic parts can be
affected.
NOTE! Before starting sectioning, instrument,
knife carrier and section waste tray with
integrated arm rest should be treated with a
commercially available paraffin repellent. (See 219-5, additional accessories).
CAUTION! When getting in contact with
cleaning agents or paraffin repellents, e.g. Para
Gard, the surface of the cover ribbon behind the
specimen clamping might be affected. For this
reason, please note that the cover ribbon does not
get in contact with these agents when cleaning the
housing, knife carrier or the base plate.
MICROM International GmbH
Robert-Bosch-Str. 49
D- 69190 Walldorf
Loosen the clamping lever on the left side of the
knife carrier and pull the knife carrier off to the
front.
Clean the operating controls and the surfaces of
the knife carrier, especially the groove of the
dovetail guide and the space where the knife
carrier is installed.
Clean the dovetail guide, handwheel, specimen
clamping system, specimen orientation as well as
the base plate and housing.